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Re: [Xen-devel] [PATCH] Allow programatic iomem permissions
| To: | Kieran Mansley <kmansley@xxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] Allow programatic iomem permissions |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Fri, 13 Jul 2007 17:20:53 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 13 Jul 2007 09:18:49 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] Allow programatic iomem permissions |
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On 13/7/07 16:54, "Kieran Mansley" <kmansley@xxxxxxxxxxxxxx> wrote: > Oops, sorry, forgot to refresh the patch before sending. This one > should compile better! The put_page[_and_type] also needs to be on the far side of the TLB flush. This is because if a refcount falls to zero then the page can change type (e.g., to pagetable page) or be recycled to another domain! This is a safety issue for Xen rather than for the granter. :-) -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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